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