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