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