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