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