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