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