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