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