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