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