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