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