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