One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,9)(5,14)(6,7)(10,16)(11,15)(12,13)(17,18,22,25)(19,23,27,21)(20,24,30,32)(26,31,28,29)(33,34,38,40)(35,41,43,37)(36,39,46,44)(42,47,48,45)(1,2)(3,8)(4,12)(5,10)(6,7)(9,13)(11,15)(14,16)(17,19)(18,23)(20,26)(21,25)(22,27)(24,31)(28,30)(29,32)(33,35)(34,37)(36,42)(38,43)(39,45)(40,41)(44,47)(46,48) involution — undirected(2,7)(3,11)(4,13)(5,16)(17,19,22,27)(18,23,25,21)(20,28,30,26)(24,29,32,31)(33,34,38,40)(35,37,43,41)(36,44,46,39)(42,47,48,45)(1,3,6,11)(2,8,7,15)(4,14,13,10)(5,12,16,9)(17,19)(18,23)(20,28)(21,25)(22,27)(24,29)(26,30)(31,32)(33,34)(35,37)(36,44)(38,40)(39,46)(41,43)(42,47)(45,48)(1,4)(2,9)(3,10)(5,15)(6,13)(7,12)(8,16)(11,14)(17,20)(18,24)(19,26)(21,29)(22,30)(23,31)(25,32)(27,28)(33,36,38,46)(34,39,40,44)(35,42,43,48)(37,45,41,47)(1,5,6,16)(2,10,7,14)(3,12,11,9)(4,15,13,8)(17,21,22,23)(18,19,25,27)(20,29,30,31)(24,26,32,28)(33,37)(34,35)(36,45)(38,41)(39,42)(40,43)(44,48)(46,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.