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