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