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