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