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