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