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