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