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