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