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