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