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)(18,23)(19,27)(20,21)(31,32)(33,34)(35,41)(36,44)(37,39)(38,42)(40,46)(43,47)(45,48) involution — undirected(1,3,7,15)(2,8,10,11)(4,12,9,16)(5,13,6,14)(17,18,22,23)(19,24,27,30)(20,26,21,25)(28,32,29,31)(33,35)(34,38)(36,45)(37,42)(39,41)(40,48)(43,46)(44,47)(1,4,7,9)(2,5,10,6)(3,12,15,16)(8,13,11,14)(17,19,22,27)(18,24,23,30)(20,29,21,28)(25,32,26,31)(34,39)(35,42)(40,44)(43,45)(1,5,7,6)(2,9,10,4)(3,13,15,14)(8,16,11,12)(17,20,22,21)(18,25,23,26)(19,28,27,29)(24,31,30,32)(33,36,37,46)(34,40,39,44)(35,43,42,45)(38,47,41,48)(1,5,7,6)(2,4,10,9)(3,14,15,13)(8,16,11,12)(17,21,22,20)(18,26,23,25)(19,28,27,29)(24,31,30,32)(34,39)(38,41)(40,44)(47,48)(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.