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