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