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