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