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