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