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