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