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