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