One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,10,6,8,4,9)(3,7,12,14,13,15,11,16)(17,18,22,26,23,27,21,37)(19,28,30,24,31,41,38,40)(20,32,36,46,35,25,34,42)(29,43,44,39,33,47,48,45)(1,3)(2,7)(4,11)(5,12)(6,13)(8,15)(9,16)(10,14)(17,19)(18,24)(20,33)(21,38)(22,30)(23,31)(25,39)(26,41)(27,40)(28,37)(29,35)(32,45)(34,44)(36,48)(42,47)(43,46) involution — undirected(2,8)(3,11)(4,5)(7,14)(12,13)(15,16)(17,20,21,34,23,35,22,36)(18,25,26,42,27,32,37,46)(19,29,30,44,31,33,38,48)(24,39,28,43,40,45,41,47)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.