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