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