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