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)(17,18,23,28)(19,29,30,39)(20,25,35,41)(21,27,22,26)(24,32,37,33)(31,43,44,48)(34,42,36,40)(38,46,47,45)(1,3,5,8)(2,6,4,7)(9,10)(11,15)(12,14)(13,16)(19,30)(24,37)(29,39)(31,44)(32,33)(38,47)(43,48)(45,46)(9,11)(10,13)(12,16)(14,15)(17,19,22,33,23,30,21,32)(18,24,27,29,28,37,26,39)(20,31,34,45,35,44,36,46)(25,38,40,43,41,47,42,48)(3,8)(6,7)(11,16)(13,15)(17,20)(18,25)(19,31)(21,36)(22,34)(23,35)(24,38)(26,42)(27,40)(28,41)(29,43)(30,44)(32,46)(33,45)(37,47)(39,48) involution — undirected(1,4,5,2)(3,7,8,6)(10,14)(13,15)(17,21,23,22)(18,26,28,27)(19,32,30,33)(20,34,35,36)(24,39,37,29)(25,40,41,42)(31,45,44,46)(38,43,47,48)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.