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