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)(20,25)(21,27)(22,29)(23,38)(24,28)(26,35)(30,40)(32,43)(33,46)(34,42)(36,47)(37,41)(39,44)(45,48) involution — undirected(1,3)(2,6)(4,10)(5,11)(7,13)(8,9)(12,16)(14,15)(17,19,22,20)(18,25,29,31)(21,34,24,32)(23,33,37,35)(26,41,46,38)(27,43,28,42)(30,44,47,45)(36,39,40,48)(1,4,5,12)(2,7,8,14)(3,10,11,16)(6,13,9,15)(17,20,22,19)(18,26,29,46)(21,34,24,32)(23,39,37,48)(25,41,31,38)(27,44,28,45)(30,43,47,42)(33,40,35,36)(3,11)(6,9)(10,16)(13,15)(17,21,22,24)(18,27,29,28)(19,32,20,34)(23,36,37,40)(25,42,31,43)(26,44,46,45)(30,38,47,41)(33,48,35,39)(2,8)(6,9)(7,14)(13,15)(17,21,22,24)(18,28,29,27)(19,32,20,34)(23,36,37,40)(25,43,31,42)(26,45,46,44)(30,41,47,38)(33,48,35,39)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.