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