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