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