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