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)(13,15)(14,16)(17,18)(19,24)(20,26)(21,27)(22,32)(23,25)(28,31)(29,30)(34,38)(36,43)(39,44)(42,47) involution — undirected(2,7)(5,14)(8,11)(9,15)(17,19,23,20)(18,24,25,26)(21,30,32,28)(22,31,27,29)(35,41)(39,44)(42,47)(46,48)(3,12)(4,13)(8,11)(9,15)(18,25)(19,20)(21,32)(29,31)(33,34,37,38)(35,39,41,44)(36,40,43,45)(42,46,47,48)(1,3,6,12)(2,8,7,11)(4,10,13,16)(5,9,14,15)(17,20,23,19)(18,26,25,24)(21,30,32,28)(22,31,27,29)(1,4,6,13)(2,9,7,15)(3,10,12,16)(5,8,14,11)(17,21)(18,27)(19,28)(20,30)(22,25)(23,32)(24,31)(26,29)(33,35,37,41)(34,39,38,44)(36,42,43,47)(40,46,45,48)(1,5,6,14)(2,10,7,16)(3,9,12,15)(4,8,13,11)(17,22,23,27)(18,21,25,32)(19,29,20,31)(24,28,26,30)(33,36)(34,40)(35,42)(37,43)(38,45)(39,46)(41,47)(44,48)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.