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