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