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