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