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