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