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