One vertex per element, one color per generator, with an edge from x to x·s.
(11,15)(12,16)(18,20)(24,27)(25,26)(31,32) involution — undirected(1,2)(3,6)(4,5)(7,8)(9,10,13,14)(11,16,15,12)(17,18,23,20)(19,27,30,24)(21,25,22,26)(28,32,29,31)(2,5)(6,8)(9,11,13,15)(10,12,14,16)(17,19,23,30)(18,24,20,27)(21,28,22,29)(25,31,26,32)(3,7)(6,8)(9,10,13,14)(11,16,15,12)(17,20,23,18)(19,27,30,24)(21,26,22,25)(28,32,29,31)(1,3,4,7)(2,6,5,8)(9,10)(11,12)(13,14)(15,16)(17,21,23,22)(18,25,20,26)(19,28,30,29)(24,31,27,32)(1,2)(3,6)(4,5)(7,8)(9,12)(10,11)(13,16)(14,15)(17,22,23,21)(18,26,20,25)(19,29,30,28)(24,32,27,31)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.