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