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