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