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