One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,9)(5,10)(6,7)(11,13)(12,16)(14,15)(17,18)(19,24)(20,22)(21,28)(23,27)(25,29)(26,30)(31,32)(33,34,39,43)(35,41,42,38)(36,45,37,40)(44,46,47,48)(2,7)(3,9)(10,15)(11,16)(17,19)(18,23)(20,24)(21,26)(22,27)(25,30)(28,31)(29,32)(33,35)(34,38)(36,44)(37,47)(39,42)(40,46)(41,43)(45,48) involution — undirected(17,18,22,20)(19,24,27,23)(21,25,29,28)(26,31,32,30)(33,36,39,37)(34,40,43,45)(35,44,42,47)(38,46,41,48)(1,3,6,9)(2,8,7,4)(5,11,14,16)(10,13,15,12)(17,20,22,18)(19,24,27,23)(21,28,29,25)(26,31,32,30)(33,37,39,36)(34,40,43,45)(35,44,42,47)(38,48,41,46)(1,4,6,8)(2,9,7,3)(5,13,14,12)(10,11,15,16)(17,19)(18,24)(20,23)(21,26)(22,27)(25,31)(28,30)(29,32)(33,35)(34,41)(36,44)(37,47)(38,43)(39,42)(40,48)(45,46)(1,5)(2,10)(3,11)(4,12)(6,14)(7,15)(8,13)(9,16)(17,21)(18,25)(19,26)(20,28)(22,29)(23,30)(24,31)(27,32)(33,38,39,41)(34,42,43,35)(36,46,37,48)(40,47,45,44)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.