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