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)(19,26)(20,25)(21,27)(22,29)(23,24)(28,32)(30,31)(3,7)(6,8)(10,13)(11,16)(18,24)(21,31)(25,26)(28,29) involution — undirected(1,2)(3,6)(4,5)(7,8)(9,11)(10,14)(12,13)(15,16)(17,19,23,20)(18,25,24,26)(21,28,31,29)(22,30,32,27)(9,12,15,14)(10,11,13,16)(17,20,23,19)(18,26,24,25)(21,28,31,29)(22,30,32,27)(1,3)(2,6)(4,7)(5,8)(9,13,15,10)(11,12,16,14)(17,21,23,31)(18,27,24,30)(19,28,20,29)(22,26,32,25)(1,2)(3,6)(4,5)(7,8)(9,14,15,12)(10,16,13,11)(17,22,23,32)(18,28,24,29)(19,27,20,30)(21,26,31,25)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.