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