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