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