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