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