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