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