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