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