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)(19,28)(20,33)(21,25)(22,36)(23,26)(24,32)(27,37)(29,44)(30,42)(31,43)(34,41)(35,48)(38,46)(39,47)(40,45)(9,10)(11,14)(12,13)(15,16)(17,19,22,32,23,31,37,47)(18,24,27,28,26,39,36,43)(20,30,34,46,21,29,35,45)(25,40,41,44,33,38,48,42)(2,5)(6,8)(10,13)(14,16)(17,20)(18,25)(19,29)(21,23)(22,34)(24,38)(26,33)(27,41)(28,42)(30,31)(32,45)(35,37)(36,48)(39,40)(43,44)(46,47) involution — undirected(1,3,4,7)(2,6,5,8)(10,13)(14,16)(17,21,23,20)(18,25,26,33)(19,30,31,29)(22,35,37,34)(24,38,39,40)(27,41,36,48)(28,42,43,44)(32,46,47,45)(9,11,12,15)(10,14,13,16)(18,26)(19,31)(20,21)(27,36)(32,47)(34,35)(38,40)(42,44)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.