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