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