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