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