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