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