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