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