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