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