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