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)(19,29)(20,30)(21,26)(22,27)(23,28)(24,31)(25,32)(1,3,4,8)(2,5,6,7)(9,10)(11,14)(12,13)(15,16)(17,19,21,25,23,30,22,31)(18,24,27,20,28,32,26,29)(10,13)(14,16)(17,20,22,24,23,29,21,32)(18,25,26,19,28,31,27,30)(9,11)(10,14)(12,15)(13,16)(19,30)(20,29)(24,32)(25,31) involution — undirected(11,15)(14,16)(17,21,23,22)(18,26,28,27)(19,31,30,25)(20,32,29,24)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.