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