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