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