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