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