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