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