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