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