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