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