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