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