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