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