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