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