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