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