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