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