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