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