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