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)(19,22)(20,23)(21,26)(24,29)(25,28)(27,31)(30,32)(33,34,39,41)(35,40,38,48)(36,42,45,37)(43,44,46,47)(2,7)(4,8)(9,15)(12,13)(17,18,22,19)(20,25,28,23)(21,24,29,26)(27,31,32,30)(33,35,39,38)(34,40,41,48)(36,43,45,46)(37,47,42,44)(18,19)(23,25)(24,26)(30,31)(34,41)(36,45)(40,48)(43,46) involution — undirected(1,3)(2,8)(4,7)(5,10)(6,11)(9,13)(12,15)(14,16)(17,19,22,18)(20,25,28,23)(21,26,29,24)(27,31,32,30)(33,36)(34,42)(35,43)(37,41)(38,46)(39,45)(40,44)(47,48)(1,4,6,8)(2,3,7,11)(5,13,14,12)(9,16,15,10)(17,20,22,28)(18,23,19,25)(21,27,29,32)(24,30,26,31)(33,37,39,42)(34,36,41,45)(35,44,38,47)(40,46,48,43)(1,5,6,14)(2,9,7,15)(3,10,11,16)(4,12,8,13)(17,21)(18,24)(19,26)(20,27)(22,29)(23,30)(25,31)(28,32)(33,38,39,35)(34,40,41,48)(36,46,45,43)(37,47,42,44)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.