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