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