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