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