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