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