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