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