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