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