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