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)(19,20)(21,24)(22,25)(23,26)(27,28)(29,31)(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)(17,19,23,21)(18,24,26,20)(22,27,30,29)(25,31,32,28)(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)(17,19,23,21)(18,20,26,24)(22,27,30,29)(25,28,32,31)(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)(17,20,23,24)(18,19,26,21)(22,28,30,31)(25,27,32,29)(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)(17,21,23,19)(18,24,26,20)(22,27,30,29)(25,28,32,31)(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)(17,22,23,30)(18,25,26,32)(19,27,21,29)(20,28,24,31)(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.