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