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