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