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)(11,13)(12,14)(15,16)(17,18,22,27,23,28,21,26)(19,25,29,31,30,32,20,24)(9,11)(10,13)(12,15)(14,16)(17,19,23,30)(18,24,28,31)(20,21,29,22)(25,27,32,26)(2,5)(6,8)(10,14)(11,15)(17,20)(18,24)(19,22)(21,30)(23,29)(25,27)(26,32)(28,31) involution — undirected(11,15)(13,16)(17,19)(18,25)(20,21)(22,29)(23,30)(24,26)(27,31)(28,32) involution — undirected(1,3,4,7)(2,6,5,8)(17,21,23,22)(18,26,28,27)(19,29,30,20)(24,25,31,32)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.