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