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