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