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