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