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