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