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