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