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)(35,42)(36,39)(37,44)(38,40)(41,46)(43,47)(45,48) 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)(33,35,39,38)(34,40,36,42)(37,43,46,45)(41,47,44,48)(2,8)(3,9)(10,13)(11,14)(18,23)(21,29)(24,25)(27,32)(33,34,39,36)(35,42,38,40)(37,41,46,44)(43,48,45,47)(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)(33,36,39,34)(35,40,38,42)(37,44,46,41)(43,47,45,48)(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)(33,37)(34,41)(35,43)(36,44)(38,45)(39,46)(40,47)(42,48)(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)(33,38,39,35)(34,40,36,42)(37,45,46,43)(41,47,44,48)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.