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