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