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