One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6)(7,11)(8,18)(9,14)(10,15)(12,17)(13,19)(16,20)(21,22,25,28)(23,29,31,26)(24,27,33,35)(30,34,32,36)(1,2,4,3)(5,7,10,17)(6,11,15,12)(8,19,16,9)(13,20,14,18)(21,23,25,31)(22,26,28,29)(24,32,33,30)(27,34,35,36)(5,8,19,7,10,16,9,17)(6,12,14,20,15,11,13,18)(21,24)(22,27)(23,30,31,32)(25,33)(26,34,29,36)(28,35)(1,3,4,2)(22,28)(24,33)(26,29)(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.