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