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