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