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