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