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