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