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