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