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