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