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