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